CN101396263B - Pressure sensing guidewire - Google Patents
Pressure sensing guidewire Download PDFInfo
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- CN101396263B CN101396263B CN 200810212063 CN200810212063A CN101396263B CN 101396263 B CN101396263 B CN 101396263B CN 200810212063 CN200810212063 CN 200810212063 CN 200810212063 A CN200810212063 A CN 200810212063A CN 101396263 B CN101396263 B CN 101396263B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/0215—Measuring pressure in heart or blood vessels by means inserted into the body
- A61B5/02156—Calibration means
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6851—Guide wires
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0242—Operational features adapted to measure environmental factors, e.g. temperature, pollution
- A61B2560/0247—Operational features adapted to measure environmental factors, e.g. temperature, pollution for compensation or correction of the measured physiological value
- A61B2560/0257—Operational features adapted to measure environmental factors, e.g. temperature, pollution for compensation or correction of the measured physiological value using atmospheric pressure
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/04—Constructional details of apparatus
- A61B2560/0443—Modular apparatus
- A61B2560/045—Modular apparatus with a separable interface unit, e.g. for communication
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/03—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs
- A61B5/036—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs by means introduced into body tracts
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M2025/0001—Catheters; Hollow probes for pressure measurement
- A61M2025/0002—Catheters; Hollow probes for pressure measurement with a pressure sensor at the distal end
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Biophysics (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Molecular Biology (AREA)
- Medical Informatics (AREA)
- Physics & Mathematics (AREA)
- Surgery (AREA)
- Cardiology (AREA)
- Vascular Medicine (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physiology (AREA)
- Pulmonology (AREA)
- Anesthesiology (AREA)
- Hematology (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention provides a pressure sensor wire assembly. The assembly comprises a pressure sensor element for measuring pressure and a wire having said pressure sensor element at its distal portion, and adapted to be inserted into the body in order to position the sensor element within the body. In addition is arranged a sensor signal adapting circuitry, being an integrated part of said assembly, wherein the pressure sensor signal is applied to the adapting circuitry to automatically generate an output pressure signal in a standardized format retrievable by an external physiology monitor. The assembly further comprises an external pressure sensor arranged at the assembly to measure the pressure outside the patient's body, the external pressure values being applied to a pressure compensation means in the assembly, wherein the output pressure signal is compensated prior to the output pressure signal being applied to the external physiology monitor.
Description
Technical field
The present invention relates to a kind of such as independent claims assembly as described in the preamble.
Background technology
From EP-1, in 774,905, learn a kind of sensor conductor assembly under specified pressure, measuring the physiologic variables in the patient body, its right has transferred the applicant as the assignee.The pressure transducer that uses in the EP document is the micro semiconductor sensor, and EP-1,774, a purpose of 905 assemblies is to be used for the never electricity configuration of these micro semiconductor sensors of total and existing patient monitor's transducer amplifier (transducer amplifiers) compatibility of solution.For example, microsensor whole pumping signal and the frequency range that usually can not find in various types of patient monitors operates.Therefore, they can not be directly connected to the multiple patient monitor who has used.In order to use with this existing monitor, must between sensor and monitor, place special interface.This additional circuit of interfaces need that is arranged in, and because existing monitor has been designed to provide only limited amount power, therefore additional circuit may need independently power supply.Therefore, the use of new micro sensor has usually increased cost and the complexity of whole system.
In addition, because above-mentioned restriction, these sensors usually must be with directly can be by physiological monitor (for example, sensitivity possibility difference) mode of using is configured to generate and the proportional output signal of the pressure of sensing, but output signal is irrelevant with the pumping signal that is supplied to sensor by monitor.As described, this and commercial can buy and inconsistent at the required electric form of widely used a lot of monitors.For this reason, novel sensor can only use with signal specific modulation and display unit, needs thus to buy extra equipment.In current medical environment, cost sensitivity is today so in vogue, and this especially is not desired.
US-5,568,815 disclose a kind of interface circuit that is used for sensor interface is arrived the patient monitor.This interface circuit comprises the power-supply circuit that receives the excitation power supply signal that is produced by the patient monitor, and generates the irregular and regular service voltage for the electrical part on the interface circuit thus.Further, power-supply circuit generates suitable sensor excitation signal.Interface circuit further comprises for the receiving circuit that receives the sensor output signal that is generated by sensor.Then, computing (scaling) circuit with this signal be scaled proportional to the physiological situation that is detected by sensor and also with the proportional parameter signal of activation power signal that is generated by the patient monitor.US-5, an obvious shortcoming of 568,815 devices is for sensor is connected to monitor, the extra cell that separates of interface circuit form to be arranged.
At US-6, a kind of similar solution is disclosed in 585,660, the document relate to a kind of will be such as the various sensor device interfaces of the guiding wire setting pressure sensor modulating apparatus to physiological monitor.Modulating apparatus comprises processor, is used for signal excitation and the signal modulation circuit of control signal modulating device.This processor also is supplied to signal the output stage that is positioned on the modulating apparatus, and expression is by the sensor signal of the processing of the sensor interface reception of modulating apparatus.The power supply that is used for the modulating apparatus processor is supplied with by the pumping signal that the physiological monitor from the driver output utmost point receives.In addition, temperature compensated current source provides adaptive electric current at least one pair of impedance transducer element, to compensate this to the difference between the variations in temperature on the impedance transducer element, helps thus to eliminate the temperature effects on the impedance transducer element.
Senior armarium (the Association of Advancement of MedicalInstrumentation of association, AAMI) be used for the power requirement of physiological monitor in having defined, particularly must follow the standard of being formulated by ANSI (American National Standards Insti tute, ANSI)/AAMIBP22-1994 (below be called " BP22 ") to the input/output connector of sensor conductor assembly.According to the BP22 standard, the input/output connector that is arranged in five wiring connector cable near-ends comprises a pair of differential output signal line.Output signal line is driven by sensor, is suitable for circuit output signal and analog converter adaptive (following further discussion).By way of example, differential output signal operates in 5 μ V/mmHg/V
EXCLower.Therefore ,-150 the opereating specification of μ V/V to 1650 μ V/V represents-30 to 330mmHg induction pressure scope.The representative resolution (minimum step) that is used for differential output signal is 0.2mmHg.
When the pressure wire that far-end is provided with pressure transducer inserts in patient's the blood vessel, for example to insert in the venae cordis of heart, when shrinking to measure this locality, the pressure measxurement program may continue several hours.The inventor notices, because human body is relevant with environmental air pressure, the fluctuation of the environmental air pressure in the operating room and variation may have significant impact to the calculating that the measurement result that receives in the pressure transducer based on body internal pressure wire place is carried out, if measure and to carry out the longer time, for example several hours, this may be obvious especially.
For complete understanding the present invention, the background knowledge of whole process of measurement will be briefly introduced.
An important application of pressure transducer wire is the contraction that can identify by carrying out so-called blood flow reserve fraction measurement (Fractional Flow Reserve-measurement, FFR) crown organ (for example, in the large venae cordis).Ratio when shrinking by acquisition in brief, between the pressure of far-end (distally) and near-end (proximally) is determined FFR.In fact, for example conduit and end thereof be inserted and positioned on during beginning in the large artery trunks.The end of conduit is provided with the pressure transducer of traditional type, the pressure transducer of this traditional type is generally to be positioned at the outer sensor of patient body, and in the liquid that it is placed on body cavity is communicated with, this this body cavity place, the end of conduit is by being full of the pipe line location of liquid.Then endoceliac pressure oscillation flows in the whole length of conduit by the liquid that is included in interior intracavity, and makes distal opening indirectly be transmitted to the vibrating diaphragm of pressure transducer near the mode of catheter tip.For this reason, because the fluctuation of liquid static pressure is inconsistent with other relevant with fluid column, the degree of accuracy of this system is affected.
When conduit was accurately located, mode was the pressure transducer wire to be inserted another inner chamber of conduit, and advances, until be positioned at the distal opening that the pressure transducer of pressure transducer wire end is located on or near inner chamber.Then carry out the calibration with the pressure transducer of and pressure transducer wire pressure correlation that measure by catheter pressure sensor.When finishing the execution calibration, further propelling pressure sensor, until pressure sensor component is positioned at patient's contraction terminal (distally), then assembly preparation gaging pressure is also determined FFR.
Because pressure transducer is calibrated with ambient pressure when process of measurement begins, therefore, the catheter pressure of measuring reacts these variations, change yet can not react these from the pressure that the pressure sensor component of calibration is measured, the variation of ambient pressure may have appreciable impact to the accuracy of the FFR that calculates in measuring process.Therefore, catheter pressure sensor is measured the pressure relevant with ambient pressure, yet the measurement of the pressure transducer of pressure transducer wire is absolute pressure.During calibration process, pressure transducer wire pressure is set equal to the pressure of catheter pressure sensor.
Therefore, the objective of the invention is to realize a kind of improved pressure sensor assembly, it generates with external pressure and changes irrelevant reliable pressure measuring value, is easy to use and have lower holistic cost.
Summary of the invention
Above-mentioned purpose realizes by the present invention according to independent claims.
Narrated in the dependent claims preferred embodiment.
According to pressure transducer of the present invention, when beginning to determine the program of internal pressure, the pressure monitor sensor, it is barometer, measure external pressure, and determine offset based on initial external pressure value and currency, thereby the pressure that compensation occurs in whole measuring process changes.By determining the difference between current pressure value and the initial pressure value, determine force value at that time when pressure difference value, current pressure value are the execution pressure measxurement, the internal pressure of then coming compensated measurement to arrive by this pressure difference value.
Description of drawings
Fig. 1 schematically shows according to the first embodiment of the present invention.
Fig. 2 schematically shows the block diagram of the conductor jointer of the first embodiment of the present invention.
Fig. 3 schematically shows according to the of the present invention second and the 3rd embodiment.
Fig. 4 schematically shows of the present invention second or the transceiver unit of the 3rd embodiment.
Fig. 5 schematically shows the block diagram of the transceiver unit of the second embodiment of the present invention.
Fig. 6 schematically shows the block diagram of second embodiment of the present invention communication unit.
Fig. 7 schematically shows the block diagram of the transceiver unit of the third embodiment of the present invention.
Fig. 8 schematically shows the block diagram of the communication unit of the third embodiment of the present invention.
The specific embodiment
Fig. 1 schematically shows for the pressure transducer wire assembly of measuring patient body's internal pressure, and Fig. 2 shows the block diagram that schematically illustrates according to the conductor jointer of the first embodiment of the present invention.
With reference to figure 2, the present invention relates to a kind of pressure transducer wire assembly for measuring patient body's internal pressure.This assembly comprises the pressure sensor component (not shown), for gaging pressure and in response to the pressing creation pressure sensor signal of measuring, pressure transducer wire (Fig. 1) has pressure sensor component at its end, and be suitable for inserting in patient's the body, thereby with the sensor element location in vivo.This assembly further comprises the sensor signal adapter circuit, as the integrated part of this assembly, wherein pressure sensor signal is provided to adapter circuit, this adapter circuit is suitable for automatically generating the output pressure signal of the reference format relevant with sensor signal, thereby the pressure of measuring can be extracted by outside physiological monitor (Fig. 1).The sensor signal adapter circuit comprises: the programmable sensor modulating unit, alignment unit, as the storage device that calibration data can be supplied with, stored and changes to, Electrically Erasable Read Only Memory (EEPROM) for example, energy device and output amplifying unit.
Programmable sensor modulating unit preferably special design is used for the PGA309 programmable analog sensor manipulator (Texas Instruments can buy) of bridge type magnetic sensor.The PGA309 special design is used for the impedance bridge type magnetic sensor to be used, and comprises three master gain modules, is used for convergent-divergent difference input bridge-type sensor signal.Therefore, as illustrated in the above, the signal of the physiologic variables that expression is measured can be adapted, thereby provides the signal of the desired form of monitor.This signal format is to determine by the reference voltage that is provided to the sensor signal adapter circuit with by the signal actual value of sensor measurement.PGA309 can be constructed to use with inside or external reference voltage.According to the present invention, for example+internal reference voltage of 2.5V is supplied to PGA309 from energy device.
Therefore, this adapter circuit generates the analog output voltage signal relevant with sensor signal, thus the physiologic variables of measuring, and for example pressure can be extracted by external device (ED).
Because each sensor element is to have its separately individual devices of feature, therefore each sensor cluster comprises calibrating installation, the programmable read only memory of electric erasable (EEPROM) preferably, the independent calibration data that obtains between the alignment epoch comprising the performed sensor element of each standalone sensor wire assembly.This calibration is relevant the carrying out of manufacturing with the pressure transducer wire.Calibration data is considered parameters such as variation and temperature drift.
This bridge pressure sensor is the driving voltage V by being generated by the PGA309 circuit preferably
EXCEncourage from PGA309.Replaceablely be, this pressure transducer can encourage from the separation energy source, for example battery or capacitive means, and perhaps from external power source, the outside main power source by monitor for example.
For for example by the given voltage V of PGA309 circuit evolving
EXC,, the output voltage (V of bridge
IN1-V
IN2) be and the proportional voltage of the voltage that is applied to sensor.Therefore, the sensor output voltage (V of bridge
IN1-V
IN2) with to be applied to the voltage of sensor proportional, for given pressure, this value will change together along with the driving voltage that applies (sensor signal among Fig. 2).This sensor output voltage preferably carries out the variations in temperature compensation in the position of sensor, and the sensor output voltage of compensation is applied to the PGA309 circuit.This PGA309 circuit comprises that also this gain block also can be used for the device except output amplifier above-mentioned for the gain block of adjusting from the output signal of this circuit.
According to another preferred embodiment of blood processor, preferably microprocessor (for example, PICI16C770 or nRF24E1 are shown in broken lines among Fig. 2) can be further used for processing the analog output voltage V with adaptive modulation sensor
OUT, its output voltage is supplied with by PGA309 programmable analog sensor manipulator.Analog output signal from the PGA309 circuit carried out the A/D conversion before being applied to blood processor 0.For sensor signal being adapted for the BP22 signal standards, may be before signal be applied to physiological monitor further processes sensor signal.Multi-path digital-the analog converter (digital-anlog converter, DAC) that for example, may be included in the blood processor is provided with expression by the signal of sensor element measurement and the numerical data (for example, 12 words) of reference voltage.
This assembly further comprises the external pressure sensor that is arranged in the assembly place, is used for measuring the outer pressure of patient body and generation and the external pressure value that depends on this pressure.The external pressure value is applied to the pressure compensator in the assembly, is suitable for the offset of reaction of formation external pressure fluctuations during process of measurement, and this output pressure signal was compensated by this offset before being applied to outside physiological monitor.
The those of ordinary skill of art of pressure sensors can identify numerous pressure transducers, can be used as the external pressure sensor that uses in pressure sensing guidewire according to the present invention.Hereinafter, with two exemplary sensors of explanation.
External pressure sensor can be the SCP1000-D01/D11 numeral absolute pressure transducer that VTI technology company (VTI Technologies) makes, and is used for for 30kPa...120kPa and-20 ℃ ... the pressure measxurement of 70 ℃ of measuring range air pressure and altimeter are used.Pressure and temperature output data are by initial calibration and compensation, and the communication between SCP1000 and its host microcontroller utilizes SPI or I
2C interface is realized.SCP1000 is by the 3D MEMS capacitive sensing element of VTI, has the Special low-voltage CMOS interface ASIC of calibration storage on the sheet, 4 default measurement modules and LCP (Liquid Crysta lPlastic, liquid crystal plastics) MID (Molded Interconnect Device, molded interconnect device) shell.The surface of this device can be installed in conjunction with circular vertical wall, is used for simple and easy waterproof sealing.
Another kind of applicable sensor is the pressure transducer of the 24PC series of Honeywell induction and Heat ﹠ Control Pty Ltd.'s manufacturing, and this sensor comprises four piezoresistors that are embedded in the silicon vibration face thin, chemical etching.Pressure changes causes vibrating diaphragm crooked, causes pressure in vibrating diaphragm and the resistor that is embedded into.Value and the applied pressure of resistor are proportional, and produce electricity output.These sensors are very little, cost is low and reliable.They have presented excellent repeatability, high accuracy and the feature of reliability under the changing environment condition.In addition, they have presented high operating characteristic concordance and the interchangeability feature that need not to calibrate again between different sensors.
When initializing process of measurement, initial external pressure value is defined as the external pressure value of initial measurement, and compensation arrangement be suitable for generating with currency and initial external pressure value between the relevant offset of difference.Therefore, every execution one-shot measurement, that is, each force value that generates with assembly for obtaining by the pressure transducer wire in measuring process all compensates by force value is increased or deducts offset for any external pressure fluctuations.
According to the first embodiment of the present invention, this assembly comprises conductor jointer, sees Fig. 2, and the near-end of pressure transducer wire is suitable for being connected to this conductor jointer.Conductor jointer is connected to outside physiological monitor in turn by connection cord (not shown among Fig. 2).Conductor jointer comprises the sensor signal adaptation circuit.
External pressure sensor preferably is disposed in the conductor jointer, but replaceable for arranging along connection cord.
Pressure compensator comprises control device and storage device, and is not shown, and the external pressure value that generates was stored in the described storage device before controlled device utilizes with definite offset.
Fig. 3 schematically shows according to the of the present invention second and the 3rd embodiment, and wherein assembly comprises transceiver unit and communication unit.The pressure transducer wire is suitable for being connected to transceiver unit at its near-end, utilize communication unit, this transceiver unit is suitable for carrying out radio communication by wireless signal, and this communication unit is connected to outside physiological monitor in turn, thereby the output pressure signal is transferred to outside physiological monitor.
Fig. 4 schematically shows of the present invention second or the transceiver unit of the 3rd embodiment.
To describe now the second and the 3rd embodiment in detail, wherein signal of communication is radio frequency signals.Radio communication is by utilizing the communication protocol of having set up, and for example bluetooth realizes.Although the use of combining wireless electricity frequency signal illustrates transceiver unit and communication unit, it should be understood that if use any interchangeable signal of communication, for example optical signal or magnetic signal, relevant feature can be suitable for equally.
With reference to figure 3 and 4, the communication module in the transceiver unit is connected to antenna 6.Shown in the figure, antenna reaches the outside of transceiver unit, and still replaceable is can be integrated in the shell of transceiver unit.The pressure transducer wire is suitable for inserting the elongated open 8 of transceiver unit.Opening within it surface is provided with the surperficial (not shown) of a plurality of electrical connections, when inserting opening 8, to be connected to the electrode surface that is positioned at the pressure transducer lead proximal end.Transceiver unit further is provided with wire clamp device (not shown), to firmly fix wire when correctly inserting opening.
According to preferred embodiment, it is the near-end of the pressure transducer electric wire of 0.35mm that transceiver unit is suitable for admitting overall diameter, and namely the internal diameter of elongated open 8 is more bigger than 0.35mm.
When the pressure transducer wire was fixed to transceiver unit, during pressure transducer inserted patient, this unit can be used as torquer.Preferably, transceiver unit is provided with guider 10, and the form of one or more elongate rib for example is set with the outer surface at transceiver unit, and the transceiver unit with rough surface perhaps is provided.
The pressure transducer wire can be fixed to transceiver unit, thereby when transceiver unit rotated along its longitudinal axis, sensor conductor also rotated, and this is that this is normally necessary for orientation sensor wire during insertion process.As interchangeable scheme, sensor conductor can be fixed to transceiver unit with respect to the mode of transceiver unit rotation.Then, control securely transceiver unit and turn the rotation that sensor conductor is realized sensor conductor by the another hand-screw by a hands.
Transceiver unit preferably starts by the start button 12 that is arranged in transceiver unit shell place and initializes.This start button is preferably mechanically activated.
Transceiver unit comprises energy device, comes to be the circuit energy supply of transceiver unit with the pressure transducer wire that links to each other.This energy device preferably for example can be included in battery or the capacitor in the sensor signal adapter circuit.
The disposable unit that pressure transducer wire and transceiver unit preferably should be sterilized before using.
Transceiver unit comprises first communication module, to process and the radio frequency communication (seeing Fig. 6 and 8) that is provided with the communication unit of second communication module.
When the pressure transducer wire being inserted transceiver unit, and communication unit is when being connected to external device (ED), and this system prepares to use.Be activated by pressing the start button that is positioned on the transceiver unit, and then attempt setting up dedicated radio link with communication unit.This preferably realizes by traditional synchronous exchange (hand shake procedure) program, thus the identification transceiver unit.This system prepares to receive the sensing data of measurement now.
Of the present invention second with the 3rd embodiment different being each other, in a second embodiment, external pressure sensor and pressure compensator are disposed in the communication unit, and in the 3rd embodiment, external pressure sensor and pressure compensator are disposed in the transceiver unit.
Therefore, Fig. 5 and 6 schematically shows respectively the transceiver unit of the second embodiment of the present invention and the block diagram of communication unit, and Fig. 7 and 8 schematically shows respectively the transceiver unit of the third embodiment of the present invention and the block diagram of communication unit.
About the common trait of first, second, and third embodiment and the function of sensor signal adapter circuit, with reference to the explanation in conjunction with Fig. 2.
In the second and the 3rd embodiment, in transceiver unit, particularly in the sensor signal adapter circuit, (see Fig. 5 and 7), carry out sensor signal and be adapted for for example operation of the signal standards of BP22.Yet, as replaceable scheme, this adaptive whole or only part can replace and carry out by the related circuit that is arranged in the communication unit.These embodiment schematically illustrate in Fig. 6 and 8.Then pressure transducer value by wireless transmission is to exist for the form with " original " measurement data, these data will be modulated by the processing that is arranged in communication unit and modulating device, thereby reference format according to the rules provides to external system with correct form.
Therefore, the second embodiment illustrates by Fig. 5 and 6, and wherein processing and modulating device should dispense in Fig. 6.Interchangeable the second embodiment also can illustrate by Fig. 5 and 6, wherein the substitute is, and the programmable sensor modulating device should dispense in Fig. 5.
In a second embodiment, external pressure sensor or come energy supply by the energy device that is arranged in communication unit perhaps comes energy supply by external monitor and/or outside main power source.This energy device for example is battery or capacitor.
Similarly, the 3rd embodiment illustrates by Fig. 7 and 8, and wherein processing and modulating device should dispense in Fig. 8.Interchangeable the 3rd embodiment also can illustrate by Fig. 7 and Fig. 8, wherein the substitute is, and the programmable sensor modulating device should dispense in Fig. 7.
In the 3rd embodiment, external pressure sensor comes energy supply by the energy device that is arranged in transceiver unit, preferably with identical energy device for the pressure transducer wire circuit energy supply that links to each other.This energy device for example is battery or capacitor.
The invention is not restricted to above preferred embodiment.Can use various replaceable schemes, revise or be equal to replacement.Therefore, top embodiment should not be regarded as and limits the scope of the invention, and scope of the present invention should be limited by the claim of enclosing.
Claims (3)
1. a pressure transducer wire assembly is used for measuring the pressure in the patient body, and this assembly comprises:
Pressure sensor component is for gaging pressure and in response to described pressing creation pressure sensor signal;
The pressure transducer wire, this pressure transducer wire has described pressure sensor component at its end, and is suitable for inserting in the body, thereby with described sensor element location in vivo;
The sensor signal adapter circuit, this sensor signal adapter circuit is the integration section of described assembly, wherein said pressure sensor signal is applied to described adapter circuit, this adapter circuit is suitable for automatically generating the output pressure signal with standardized format relevant with described sensor signal, thereby the pressure of measuring can be extracted by outside physiological monitor, it is characterized in that, described assembly further comprises the external pressure sensor that is arranged in the described assembly, to measure the outer pressure of patient body, and depend on this pressing creation external pressure value, this external pressure value is applied to the pressure compensator that is arranged in described assembly, in measuring process, pressure compensator is adapted to be the offset of reaction of formation external pressure fluctuations, wherein said output pressure signal is compensated by described offset before being applied to outside physiological monitor, and described assembly further comprises transceiver unit and communication unit, described pressure transducer wire is suitable for being connected to described transceiver unit at its near-end, this transceiver unit has the elongated open that is suitable for inserting the pressure transducer lead proximal end, transceiver unit is suitable for described communication unit by the signal of communication radio communication, described communication unit is connected to described outside physiological monitor, thereby the output pressure signal is transferred to described outside physiological monitor, and external pressure sensor is disposed in the described communication unit; When initializing process of measurement, the external pressure value that an initial external pressure value is confirmed as measuring, and, at that time the force value offset relevant with the difference between described initial external pressure value when described compensation arrangement generates with the execution pressure measxurement.
2. pressure transducer wire assembly according to claim 1, wherein said radio communication realizes by the communication protocol of utilizing the bluetooth of having set up.
3. pressure transducer wire assembly according to claim 1, wherein said pressure compensator comprises control device and storage device, and the external pressure value that generates is stored in the described storage device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP07117110.2 | 2007-09-25 | ||
| EP07117110.2A EP2042091B1 (en) | 2007-09-25 | 2007-09-25 | Pressure sensing guidewire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101396263A CN101396263A (en) | 2009-04-01 |
| CN101396263B true CN101396263B (en) | 2013-05-01 |
Family
ID=38969797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810212063 Active CN101396263B (en) | 2007-09-25 | 2008-09-16 | Pressure sensing guidewire |
Country Status (5)
| Country | Link |
|---|---|
| EP (2) | EP2042091B1 (en) |
| JP (1) | JP5763289B2 (en) |
| CN (1) | CN101396263B (en) |
| AU (2) | AU2008212034B2 (en) |
| ES (1) | ES2474198T3 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11234650B2 (en) | 2006-11-20 | 2022-02-01 | St. Jude Medical Coordination Center Bvba | Measurement system |
| US8174395B2 (en) * | 2006-11-20 | 2012-05-08 | St. Jude Medical Systems Ab | Transceiver unit in a measurement system |
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- 2007-09-25 EP EP07117110.2A patent/EP2042091B1/en active Active
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| EP1774905A1 (en) * | 2005-10-12 | 2007-04-18 | Radi Medical Systems Ab | Sensor wire assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2008212034A1 (en) | 2009-04-09 |
| CN101396263A (en) | 2009-04-01 |
| ES2474198T3 (en) | 2014-07-08 |
| JP5763289B2 (en) | 2015-08-12 |
| AU2014203450A1 (en) | 2014-07-17 |
| EP2767227A1 (en) | 2014-08-20 |
| EP2042091A1 (en) | 2009-04-01 |
| AU2014203450B2 (en) | 2015-04-16 |
| AU2008212034B2 (en) | 2014-04-03 |
| JP2009078148A (en) | 2009-04-16 |
| EP2042091B1 (en) | 2014-05-14 |
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